Buggy code:
public class FunDefDialog extends Dialog { private final FunDef mFunDef ; private Method mSelectedMethod ; private Vector < String > mArgNameList = new Vector < String > ( ) ; private HashMap < String , String > mNameMap = new HashMap < String , String > ( ) ; private HashMap < String , String > mTypeMap = new HashMap < String , String > ( ) ; private HashMap < String , Method > mMethodMap = new HashMap < String , Method > ( ) ; private JLabel mNameLabel ; private JTextField mNameTextField ; private JLabel mClassNameLabel ; private JTextField mClassNameTextField ; private JLabel mMethodLabel ; private JComboBox mMethodComboBox ; private JLabel mArgLabel ; private JList mArgList ; private JScrollPane mArgScrollPane ; private JButton mOkButton ; private JButton mCancelButton ; private JLabel mMessageLabel ; private JPanel mFunDefContent ; private JPanel nameContainer ; private JPanel methodContainer ; private JPanel classNameContainer ; private JPanel argContainer ; private JPanel mUpperPanel ; private JPanel mLowerPanel ; private Color mDefaultColor ; private Boolean mIsValidClass ; private final Document mNameDocument = new PlainDocument ( ) { @ Override public void insertString ( int offs , String str , AttributeSet attr ) throws BadLocationException { } @ Override public void replace ( int offs , int len , String str , AttributeSet attr ) throws BadLocationException { } } ; public FunDefDialog ( FunDef funDef ) { } private void initComponents ( ) { } private void fillComponents ( ) { } private void initMethodComboBox ( ) { } private void initMethodComboBox ( String className ) { } private void getAvailableMethodNames ( Class c ) { } public JPanel createPanel ( ) { } private void updateArgList ( ) { ( ( DefaultListModel ) ( mArgList . getModel ( ) ) ) . clear ( ) ; if ( ( mSelectedMethod ) != null ) { Class [ ] parameterTypes = mSelectedMethod . getParameterTypes ( ) ; for ( int i = 0 ; i < ( parameterTypes . length ) ; i ++ ) { Class parameterType = parameterTypes [ i ] ; String parameterName = mArgNameList . get ( i ) ; <START_BUG> String parameterTypeName = parameterType . getSimpleName ( ) ; <END_BUG> String composedParameterName = ( ( parameterName + "<seq2seq4repair_space>(" ) + parameterTypeName ) + ")" ; mNameMap . put ( composedParameterName , parameterName ) ; mTypeMap . put ( composedParameterName , parameterTypeName ) ; ( ( DefaultListModel ) ( mArgList . getModel ( ) ) ) . addElement ( composedParameterName ) ; } } } private void resizeArgNameList ( ) { } public void methodComboBoxActionPerformed ( ActionEvent evt ) { } public void classTextFieldKeyTyped ( KeyEvent evt ) { } public void argumentListMouseClicked ( MouseEvent evt ) { } private String methodToString ( Method method ) { } private String methodToString ( ) { } @ Override public void okActionPerformed ( ) { } @ Override protected void cancelActionPerformed ( ) { } public FunDef run ( ) { } public FunDef getFunDef ( ) { } public JTextField getNameInput ( ) { } public JTextField getClassNameInput ( ) { } public JComboBox getMethodBox ( ) { } public Method getSelectedMethod ( ) { } public JList getArgList ( ) { } public JPanel getContent ( ) { } public HashMap < String , Method > getmMethodMap ( ) { } public HashMap < String , String > getNameMap ( ) { } public HashMap < String , String > getTypeMap ( ) { } public void paintPanel ( Color color ) { } public void setSelectedBackground ( boolean selected ) { } public void setErrorBackground ( ) { } public Boolean getIsValidClass ( ) { } public void setSelectedMethod ( Method value ) { } }

Fix:
String parameterTypeName = parameterType . getName ( ) ;